public Node Expand()
{
LimitHoldEmAction action = unexploredActions[0];
unexploredActions.RemoveAt(0);
LimitHoldEmState newState = state.Step(action);
Node childNode = new Node(newState, this);
children.Add(childNode);
return(childNode);
}
public double Rollout(Node node)
{
LimitHoldEmState currentState = node.state;
while (!currentState.isTerminal)
{
List <LimitHoldEmAction> actions = currentState.GetActions();
Random random = new Random();
LimitHoldEmAction action = actions[random.Next(0, actions.Count)];
currentState = currentState.Step(action);
}
return(currentState.reward);
}
public void Initialize()
{
LimitHoldEmState state = new LimitHoldEmState();
state.Reset();
List <LimitHoldEmState> states = new List <LimitHoldEmState> {
(LimitHoldEmState)state.Clone()
};
uint[] nBuckets = new uint[4] {
169, 1000, 500, 200
};
for (int i = 0; i < 169; ++i)
{
policy[i.ToString()] = new InformationState();
}
while (states.Count != 0)
{
state = states[0];
states.RemoveAt(0);
List <LimitHoldEmAction> actions = state.GetActions();
foreach (LimitHoldEmAction action in actions)
{
LimitHoldEmState newState = state.Step(action);
for (int bucket = 0; bucket < nBuckets[state.street]; ++bucket)
{
policy[bucket.ToString() + newState.previousActions] = new InformationState();
}
if (!newState.isTerminal)
{
states.Add(newState);
}
}
}
}
static void Play(LHEPolicy lhePolicy, uint userIndex = 0)
{
LimitHoldEmState state = new LimitHoldEmState();
LimitHoldEmAction selectedAction = LimitHoldEmAction.Call;
string selectedActionName = "";
double winnings = 0;
while (true)
{
state.Reset();
while (!state.isTerminal)
{
if (state.playerIndex == userIndex)
{
Console.WriteLine("Your cards: " + state.holeCards[userIndex]);
Console.WriteLine("Community cards: " + state.communityCards);
Console.WriteLine("Total winnings so far: " + winnings);
uint pot = state.potContributions[0] + state.potContributions[1];
Console.WriteLine("Pot: " + pot);
selectedActionName = "";
while (selectedActionName != "c" && selectedActionName != "f" && selectedActionName != "r")
{
selectedActionName = Console.ReadLine();
selectedActionName = selectedActionName.ToLower();
if (selectedActionName == "q" || selectedActionName == "quit")
{
Environment.Exit(0);
}
}
switch (selectedActionName)
{
case "c":
selectedAction = LimitHoldEmAction.Call;
break;
case "f":
selectedAction = LimitHoldEmAction.Fold;
break;
case "r":
selectedAction = LimitHoldEmAction.Raise;
break;
}
}
else
{
uint bucket = state.Discretize(state.street, state.playerIndex);
string policyKey = bucket.ToString() + state.previousActions;
string actionName;
LimitHoldEmAction bestAction = LimitHoldEmAction.Call;
double bestValue = double.MinValue;
string bestActionName = "c";
foreach (LimitHoldEmAction action in state.GetActions())
{
switch (action)
{
case LimitHoldEmAction.Fold:
actionName = "f";
break;
case LimitHoldEmAction.Raise:
actionName = "r";
break;
default:
actionName = "c";
break;
}
string newKey = policyKey + actionName;
double actionValue = lhePolicy.policy[newKey].value;
if (state.playerIndex == 1)
{
actionValue *= -1;
}
if (actionValue > bestValue)
{
bestValue = actionValue;
bestAction = action;
bestActionName = actionName;
}
selectedAction = bestAction;
selectedActionName = bestActionName;
}
Console.WriteLine("\nSmoothUCT: " + selectedActionName + "\n");
}
state = state.Step(selectedAction);
}
uint opponent = (userIndex == 0) ? 1u : 0;
Console.WriteLine("\nSmoothUCT cards: " + state.holeCards[opponent]);
double hand_winnings;
if ((state.reward > 0 && userIndex == 0) || (state.reward < 0 && userIndex == 1))
{
hand_winnings = state.potContributions[opponent];
Console.WriteLine("You win " + hand_winnings);
winnings += hand_winnings;
}
else if (state.reward == 0)
{
Console.WriteLine("Split pot");
}
else
{
hand_winnings = state.potContributions[userIndex];
Console.WriteLine("SmoothUCT wins " + hand_winnings);
winnings -= hand_winnings;
}
userIndex = (userIndex + 1) % 2;
Console.WriteLine("==========================================================================================");
}
}